Method of aperture controlled electrostatic image reproduction or constitution

ABSTRACT

THE INVENTION BASICALLY COMPRISES APPARATUS AND METHODS RELATING TO THE FIELD OF ELECTROSTATICS, AND IS CONCERNED WITH ELECTROSTATIC REPORDUCING OR CONSTITUTING. APERTURED SCREEN MEANS CARRY CHARGE DISTRIBUTIONS IN ACCORDANCE WITH A PATTERN SUCH THAT PARTICULES DIRECTED AT THE SCREEN MEANS PASS THERETHROUGH UNDER MOEDULATION CTROL DICTATED BY THE PATTERN. THE INVENTION FURTHER RELATES TO APPARATUS AND METHODS FOR CONSTITUTING OR REPRODUCING IMAGES THROUGH THE USE OF A MULTI-LAYERED CREEEN CONSISTING OF AN ARRAY OF APERTURES. A PROPULSION FIELD DIRECTS CHARGED PARTICLES THROUGH THE SCREEN TO A RECEIVING MEDIUM PREFERABLY SPACED AT A DISTANCE FROM THE SCREEN. CHARGE DISTRIBUTION ON THE SCREEN CONTROLS THE FLOW OF PARTICLES THROUGH THE APERATURES, SOME OF WHICH ARE IN EFFECT BLOCKED, PARTIALLY BLOCKED, UNBLOCKED, AND ENHANCED, DEPENDING ON THE LOCAL CHARGE LEVEL. THUS, IT IS POSSIBLE TO PRODUCE PATTERNS OF VARYING TONE WITHOUT CONTACT WITH THE PRINTED OR EFFECTED SUBSTRATE.

y 7, 1574 G. L. PRESSMAN ETAL 3,809,556

METHOD OF APERTURE CONTROLLED ELECTROSTATIC IMAGE REPRODUCTION OR CONSTITUTION Original Filed Nov. 15, 1968 22 Sheets-Sheet .1

f SUBSTRATE TO BE PRINTED l-AREA TO BE PRlNTED- SINGLE SIGN Cl-iAFGE LAYER ACTUAL BLOCKED R CON DUCTOR Mayv 7, 1974 G. 1.. PRESSMAN ETAL 3,809,556

METHOD OF APERTURE CONTROLLED ELECTROSTATIC IMAGE REPRODUCTION OR CONSTITUTION Original Filed Nov. 15, 1968 22 Sheets-Sheet 2 FIG-3 SCREEN SCREEN 1 TV pr 47 ILLUMINA E PRINT cHAReE/, TONER 4| SOURCE 43 45 CORONA 43 TRANSPARENT ELECTRODE ILLUMINATE TONER souRcE- 43 PRE- CORONA SPRAY @5 6| y 7, 1974 cs. L. PRESSMAN ETAL 3,809,556

METHOD OF APERTURE CONTROLLED ELECTROSTATIC IMAGE REPRODUCTION OR CONSTITUTION Original Filed Nov. 15, 1968 22 Sheets-Sheet 5 DIRECTION l KPARTIcLE /.9 FIG.4.

y 7, 1974 G. L. PRESSMAN EI'AL 3,809,556

METHOD OF APERTURE CONTROLLED ELECTROSTATIC IMAGE REPRODUCTION OR CONSTITUTION Original Filed Nov. 15, 1968 22 t -s PARTICLE PATHS 0.0840

FIGS

May 7, 1974 G. L. PRESSMAN ETAL 3,809,556

METHOD OF APERTURE CONTROLLED ELECTROSTATIC IMAGE REPRODUCTION OR CONSTITUTION Original Filed Nov. 15, 1968 22 Sheets-Sheet 5 Im mTzsaT I03 fii' 2-1? fi HIGH STRENGTH m INSULATOR CONDUCTOR FIGBQ I07 HIGH RESISTIVITY MATERIAL :1-1 PHOTOSENSITIVE ////////A MATERIAL CONDUCTOR FIG. 8b

' THIN LAYER m PHOTOSENSITIVE MATERIAL W INSULATOR CONDUCTOR FIGBc y 1974 G. L. PRESSMAN ET AL 3,809,556

METHOD OF APERTURE CONTROLLED ELECTROSTATIC IMAGE REPRODUCTION OR CONSTITUTION Original Filed Nov. 15, 1968 22 Sheets-Sheet G O. 270 HI FIG.9

L PRESSMAN ETAL 3,809,556 METHOD OF APERTURE CONTROLLED ELECTROSTATIC 22 Sheets-Sheet 7 May 7,

IMAGE REPRODUCTION OR CONSTITUTI Original Filed Nov. 15, 1968 May 7, 1974 G. L. PRESSMAN ETAL METHOD OF APERTURE CONTROLLED ELECTROSTATIC IMAGE REPRODUCTION OR CONSTITUTIO Original Filed Nov. 15, 1968 ENTRANCE APER'I'URE Ov I40 TRANSPARENT CONDUCTIVE COATING TRANSPARENT IN SULATOR SCREEN FIG]! PHOTOCONDUCTOR 6. .1:; connucnv: BACKING -q N 22 Sheets-Shae t CHARGING a VOLTAGE May 7, 1974 G. L. PRESSMAN ETAL 3,809,556 METHOD OF APERTURE CONTROLLED ELECTROSTATIC IMAGE REPRODUCTION OR CONSTITUTION Original Filed Nov. 15, 1968 22 Sheets-Sheet 5 May 7, 1974 F ETAL 3,809,556

METHOD OF APERTURE CONTROLLED ELECTROSTATIC IMAGE REPRODUCTION OR CONSTITUTION Original Filed Nov, 15, 1968 22 Sheets-Sheet 1O PosITIVE PRINT NEGATIVE PRINT Pos. PART NEG. PART POS. PAR NEG. PART A c A c s c B 0 C s.c. s.c.

T; NoNE NoNE PosITIVE PARTICLES NEGATIVE PARTICLES VOLTAGE NE G. Pos. NEG. POS. PRINTING PRINTING PRINTING PRINTING FIGJGQ.

y 7, 1974 G. L. PRESSMAN ETTAL 3,809,556

METHOD OF APERTURE CONTROLL ELECTROSTATIC IMAGE REPRODUCTION OR STITUTION Original Filed Nov. 15, 1968 22 Sheets-Sheet 1 FIG. 24

253 ET HQ 26 5 y 7, 4 G. 1.. PRESSMAN ETAL 3,809,556

METHOD OF APERTURE CONTROLLED ELECTROSTATIC IMAGE HEPRODUCTION'OR CONSTITUTION Original Filed Nov. 15, 1968 22 Sheets-Sheet 13 T FIG.29

T i W "G h \g L i an PRINT r l 309 i H I 319 FIG.3|

y 7, 1974 G L. PRESSMAN EI'AL 3,809,556

METHOD OF AIERTURE CONTROLLED ELECTROSTATIC IMAGE REPRODUCTION OR CONSTITUTION Original Filed Nov. 15, 1968 22 Sheets-Sheet 13 323 309 1- K Ep PRlNT May 7, 1974 PRESSMAN ETAL 3,809,556

METHOD OF APERTURE CONTROLLED ELECTROSTATIC IMAGE REPRODUCTION OR CONSTITUTION Original Filed Nov. 15, 1968 22 Sheets-Sheet l4 ILIGHT L. PRESSMAN ETAL 3,809,556 METHOD OF APERTURE CONTROLLED ELECTROSTATIC 22 Sheets-Sheet 15 May 7,

' IMAGE REPRODUCTION OR CONSTITUTION Original Filed Nov. 15, 1968 y 1974 G. L. PRESSMAN HAL 3,309,555

METHOD OF APERTURE CONTROLLED ELECTROSTATIC IMAGE REPRODUCTION OR CONSTITUTION 22 Sheets-Sheet 16 Original Filed Nov. 15, 1968 I] I I TIMER May 7, 1974 ss EI'AL 3,809,556

- METHOD OF APERTURE CONTROLLED ELECTROSTATIC IMAGE REPRODUCTION OR CONSTITUTION Original Filed NOV. 15, 1968 22 Sheets-Sheet 1'7 FIG 49 m K SH May 7, 1974 L Ess ErAL 3,809,556

METHOD OF APERTURE CONTROLLED ELECTROSTATIC IMAGE REPRODUCTION OR CONSTITUTION Original Filed Nov. 15, 1968 22 Sheets-Sheet 1a y 7, 1974 G. PRESSMAN ETAL 3,809,556

METHOD OF APERTURE CONTROLLED ELECTROSTATIC IMAGE REPRODUCTION OR CONSTITUTION Original Filed Nov. 15, 1968 22 Sheets-Sheet 19 bmw +++ III QM M mm OE May 7, 1974 PRESSMAN ETAL 3,809,556

METHOD OF APERTURE CONTROLLED ELECTROSTATIC IMAGE REPRODUCTION on CONSTITUTION Original Filed Nov. 15, 1968 22 Sheets-Sheet 2O I I I I I I I I I I I I I I I I I I FIG.54o.

FIG.54b 

